Law enforcement officials arrested a Pennsylvania man early Wednesday who had checked into the Trump International Hotel in Washington because he had left a semi-automatic assault style rifle, a handgun and ammunition in his vehicle.

Peter Newsham, the chief of the D.C. police, told reporters Wednesday that law enforcement officials had “averted potential disaster in our nation’s capital” with the arrest and had acted off information from a tipster. The charge is for illegal firearms possession.

Newsham said an investigation into the motive of the man, identified as 43-year-old Bryan Moles, is underway, and said he is concerned by the circumstances, which he described as peculiar. The Trump Organization property is located on Pennsylvania Avenue, not far from the White House, in the Old Post Office building.

Moles does not have a license to carry firearms in D.C., Newsham said.

The Secret Service also released a statement on the incident Wednesday saying that it had “investigated a report of a potential threat against Secret Service protectees” but that “at no time were any Secret Service protectees at risk.”

Newsham said Moles is being interviewed by police and has been sharing information with law enforcement. He declined to comment on reports that Moles has said that he likes President Donald Trump.